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DB Merge

StreamableKNIME database nodes version 4.0.2.v201909271540 by KNIME AG, Zurich, Switzerland

Merges (insert/updates) all data rows from the selected database table that match the values of a row from the selected KNIME input table columns. All selected column names of the KNIME table need to exactly match the column names from the database. The WHERE column values of the input KNIME data row need to match the values of the database row to update; whereas the SET database column values are replaced by the input KNIME column values. Only the rows matching all values of the selected column of any given input row will be updated. If no matching rows are found, the node inserts new row into the selected database table. The column order of the KNIME table and the database table do not need to match.
The output table contains two additional columns if Append merge statuses checkbox is checked. The first extra columns is the number of rows affected by the MERGE statement. A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution. A value of -2 -- indicates that the command was processed successfully but that the number of rows affected is unknown. The second column shows a warning message, if any.

Options

Settings

Table to merge
Click Select a table to select the table to merge in the pop up dialog, or enter a valid Schema and Table name into the input fields.
Batch size
Enter a number greater than 0 for the number of rows merged in one batch job. Entering 1 disables batch processing. This way only one row is processed at a time.
Fail on error
Disable this if you want to continue after an error.
Append merge status columns
Enable this to append two additional (status and error) columns to the output table (see description).
Select the columns to merge (SET in SQL)
Select the columns which should be merged in the database e.g. if a matching row exists the values of the selected columns are updated otherwise a new row is created and the values of the selected columns are inserted in to the corresponding database columns. The column names in the KNIME input table need to match the column names in corresponding database table. In SQL this is equivalent to the SET columns.
Select identification columns (WHERE in SQL)
Select all columns used to identify the records in the database that should be merged. Only records in the database that match the values from the input table are merged. The column names in the KNIME input table need to match the column names in corresponding database table. In SQL this is equivalent to the WHERE columns.

Output Type Mapping

This tab allows you to define rules to map from KNIME types to database types.

Mapping by Name
Columns that match the given name (or regular expression) and KNIME type will be mapped to the specified database type.
Mapping by Type
Columns that match the given KNIME type will be mapped to the specified database type.

Input Ports

KNIME data Table with the data rows to be merged into the database.
DB Connection to the database.

Output Ports

Input KNIME data table with additional columns providing the number of affected rows in the database and warnings, if checked in the dialog.
DB Data referencing the selected database table.

Best Friends (Incoming)

Best Friends (Outgoing)

Installation

To use this node in KNIME, install KNIME Database from the following update site:

KNIME 4.0
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